From 80bdb2f3b28cbd047929c087859b81940a942fb4 Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Fri, 18 Sep 2015 12:30:07 +0200
Subject: [PATCH] fixes #3343

---
 lib/system.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/system.nim b/lib/system.nim
index 8f529b8c0f..af10f57735 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -243,7 +243,7 @@ when defined(nimArrIdx):
   # :array|openarray|string|seq|cstring|tuple
   proc `[]`*[I: Ordinal;T](a: T; i: I): T {.
     noSideEffect, magic: "ArrGet".}
-  proc `[]=`*[I: Ordinal;T,S](a: var T; i: I;
+  proc `[]=`*[I: Ordinal;T,S](a: T; i: I;
     x: S) {.noSideEffect, magic: "ArrPut".}
   proc `=`*[T](dest: var T; src: T) {.noSideEffect, magic: "Asgn".}